jgg     2013 33 (5):  53-57    ISSN: 0412-1961  CN: 21-1139/TG APPLICATION OF EXTREME LEARNING MACHINE IN SATELLITE  CLOCK ERROR PREDICTION 1) National Time Service Center, CAS, Xi’an 710600 2) Key Laboratory of Time and Frequency Primary Standards, CAS, Xi’an 710600 3) University of Chinese Academy of Sciences, Beijing 100049 Received: 2013-02-27  Revised: null  Online: 2013-10-13 Supporting info